@BOOK{heiskanen_moritz_1967,
  author =       {Weikko A. Heiskanen and Helmut Moritz},
  title =        {Physical Geodesy},
  publisher =    {W. H. Freeman and Company},
  year =         {1967},
}

@ARTICLE{hapgood_1992,
  author = {M.A. Hapgood},
  title  = {Space physics coordinate transformations: a users guide},
  journal= {Planet. Space Sci.},
  volume = {40},
  pages  = {711-717},
  year   = {1992}
}

@BOOK{lang_1980,
  author  =      {Kenneth R. Lang},
  title =        {Astrophysical Formulae: A compendium fo the Physicist and Astronphysicist},
  publisher =    {Spinger-Verlag},
  year =         {1980},
  edition =      {2nd},
}

@INCOLLECTION{geospace_handbook_geodesy,
  author  =      {C. Jekeli},
  title =        {Geodesy and Gravity},
  booktitle =    {Handbook of Geophysics and The Space Environment},
  editor =       {Adolph S. Jursa},
  publisher =    {Air Force Geophysics Laboratory},
  year =         {1985},
  chapter =      {24}
}

@BOOK{goldstein_1980,
  author =       {Herbert Goldstein},
  title =        {Classical mechanics},
  publisher =    {Addison-Wesley},
  year =         {1980},
  series =       {Addison-Wesley Series in Physics},
  edition =      {2nd},
}

@BOOK{numerical_recipes,
  author =       {Willam H. Press and Saul A. Teukolsky and William T. Vetterling and Brian P. Flannery},
  title =        {Numerical Recipes in C},
  publisher =    {Cambridge University Press},
  year =         {1997},
  edition =      {2nd},
}
